package com.adb.androidwebalbum.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;

public class JSONParser {
	
	private String TAG = JSONParser.class.getCanonicalName();
	
	static InputStream is = null;
	static JSONObject jObj = null;
	static String json = "";

	// constructor
	public JSONParser() {

	}

	public JSONObject getJSONFromUrl(String url,String offset,String limit) {

		// Making HTTP request
		try {
			// defaultHttpClient
			DefaultHttpClient httpClient = new DefaultHttpClient();
			HttpPost httpPost = new HttpPost(url);
			httpPost.setHeader( "Content-Type", "application/json" );
			
			
			JSONObject mJSONObject = new JSONObject();     
			mJSONObject.put(Const.OFFSET,offset);
			mJSONObject.put(Const.LIMIT,limit);
			
			Log.debug(TAG, mJSONObject.toString());
			
			StringEntity se = new StringEntity(mJSONObject.toString());
			se.setContentEncoding("UTF-8");
		    se.setContentType("application/json");
		    
		    httpPost.setEntity(se); 
			
			HttpResponse httpResponse = httpClient.execute(httpPost);
			HttpEntity httpEntity = httpResponse.getEntity();
			is = httpEntity.getContent();

		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}catch (JSONException e) {
			e.printStackTrace();
		}

		try {
			BufferedReader reader = new BufferedReader(new InputStreamReader(
					is, "iso-8859-1"), 8);
			StringBuilder sb = new StringBuilder();
			String line = null;
			while ((line = reader.readLine()) != null) {
				sb.append(line + "\n");
			}
			is.close();
			json = sb.toString();
		} catch (Exception e) {
			Log.debug("Buffer Error", "Error converting result " + e.toString());
		}

		// try parse the string to a JSON object
		try {
			jObj = new JSONObject(json);
		} catch (JSONException e) {
			Log.debug("JSON Parser", "Error parsing data " + e.toString());
		}

		// return JSON String
		return jObj;

	}
	
}
